Abstract
Abstract Since July 1983 ISCCP has collected, normalized, and calibrated radiance data (visible and thermal infrared) from the imaging radiometers on the National Oceanic and Atmospheric Administration polar orbiters and from the geostationary satellites GOES, Meteosat, and GMS. Although analyzed by the International Satellite Cloud Climatology Project (ISCCP) to obtain information about clouds, this global radiance dataset also represents a valuable resource for other remote sensing studies. Examination of the 8-yr cloud climatology produced with the first version of the ISCCP calibration revealed artifacts in the global means that coincided with the changes in the afternoon polar orbiters (used as a reference standard), as well as some localized anomalies related to occasional errors in the geostationary normalizations. This paper reports the changes to the ISCCP normalization and calibration procedures (originally reported in Brest and Rossow) that have been made to reduce these artifacts and errors an...
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